Abstract

In high-energy electron-nucleus scattering, a new quantity for characterizing the additional information about the structure of a nuclear transition contained in the current distributions is defined, the vorticity density. It is symmetrical between the states involved in the transition, and it is completely unconstrained by the transition charge distribution. It is evaluated and discussed for single-particle harmonic oscillator transitions, for hydrodynamic collective transitions, and then for 3 − transitions in 208Pb as described by the random phase approximation. Its relationship to collectivity is discussed.

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